Denmark said Monday it will summon the US ambassador after President Donald Trump announced he had appointed a special envoy to Greenland, the Danish autonomous territory he has threatened to annex. In response, European Commission chief Ursula von der Leyen and European Council President Antonio Costa said they stood "in full solidarity with Denmark and the people of Greenland". Denmark said Monday it would summon the US ambassador after President Donald Trump appointed a special envoy to Greenland who immediately vowed to make the Danish autonomous territory "a part of the US". Since returning to the White House in January,...